*{
  margin: 0;
  padding: 0;
}
ul, li, ol{
  list-style: none;

}
a{
  text-decoration: none;
  color: #333333;

}

/*正常的未被访问过的链接*/
a:link {
  text-decoration: none;
}

/*已经访问过的链接*/
a:visited {
  text-decoration: none;

}

/*鼠标划过(停留)的链接*/
a:hover {
  text-decoration: none;

}

/* 正在点击的链接*/
a:active {
  text-decoration: none;

}

img{
  vertical-align: middle;
}
input{
  outline: none;
  border: none;
}
body{
  background-color: #f4f4f4;
}